package com.example.demo.util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;
import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

public class Util {
  public static String sendGet_Original_void(String url, String param) {
    System.out.println("[http send] get. url: " + url + " param: " + param);
    String result = "";
    BufferedReader in = null;
    try {
      String urlNameString = url + "?" + param;
      URL realUrl = new URL(urlNameString);
      URLConnection connection = realUrl.openConnection();
      connection.setRequestProperty("accept", "*/*");
      connection.setRequestProperty("connection", "Keep-Alive");
      connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
      connection.connect();
      Map<String, List<String>> map = connection.getHeaderFields();
      for (String key : map.keySet())
        System.out.println(key + "--->" + map.get(key)); 
      in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
      String line;
      while ((line = in.readLine()) != null)
        result = result + line; 
    } catch (Exception e) {
      System.out.println("发送get 请求异常"+ e);
      e.printStackTrace();
    } finally {
      try {
        if (in != null)
          in.close(); 
      } catch (Exception e2) {
        e2.printStackTrace();
      } 
    } 
    return result;
  }
  
  public static String sendGet(String url, String param) throws IOException {
    String ret = "";
    CloseableHttpClient httpclient = null;
    CloseableHttpResponse response = null;
    try {
      httpclient = HttpClients.createDefault();
      HttpGet httpget = new HttpGet(url + "?" + param);
      response = httpclient.execute((HttpUriRequest)httpget);
      HttpEntity entity = response.getEntity();
      if (entity != null)
        ret = EntityUtils.toString(entity); 
    } catch (Exception e) {
      throw e;
    } finally {
      httpclient.close();
      response.close();
    } 
    return ret;
  }
}
